# HG changeset patch
# User Christian Urban <christian dot urban at kcl dot ac dot uk>
# Date 1415699479 0
# Node ID 0397d557c362cf4689541ce67cf9cde24415b2ab
# Parent  17890d4b06885e156e4b64972ac7def4d6a08730
updated

diff -r 17890d4b0688 -r 0397d557c362 slides/slides07.pdf
Binary file slides/slides07.pdf has changed
diff -r 17890d4b0688 -r 0397d557c362 slides/slides07.tex
--- a/slides/slides07.tex	Mon Nov 10 23:28:19 2014 +0000
+++ b/slides/slides07.tex	Tue Nov 11 09:51:19 2014 +0000
@@ -339,10 +339,10 @@
 
 
 \begin{itemize}
-\item in 1990 insurance databases were made public with names removed, but  birth dates, 
+\item in 1990 medical databases were made public with names removed, but  birth dates, 
 gender, ZIP-code were retained\medskip
 \item could be cross referenced with public voter registration data in order to find out what the
-medical record of the governor of Massachusetts was
+medical record of the governor of Massachusetts was (in 1997 Latanya Sweeney)
 \end{itemize}
 
 \end{frame}}
@@ -370,8 +370,33 @@
 
 \end{frame}}
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% 
+
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-\mode<presentation>{
+\begin{frame}[c]
+\frametitle{AOL Search Queries}
+
+\begin{itemize}
+\item In 2006, AOL published 20 million Web search queries 
+  collected of 650,000 users (names had been deleted)\medskip
+  
+\item within days an old lady, Thelma Arnold, from Lilburn
+  Georgia was identified as user No. 4417749
+  
+\item some of the queries that gave her away:  
+\begin{itemize}
+\item landscapers in Lilburn, Ga
+\item 60 single men
+\item nicotine effects on the body
+\item \ldots 
+\end{itemize}  
+\end{itemize}
+
+\end{frame}
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% 
+
+
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 \begin{frame}<2>[c]
 \frametitle{\large How to Safely Disclose Information?}
 
@@ -393,7 +418,7 @@
 to identify whether an individual was part of the study --- DB closed in 2008) 
 \end{itemize}}
 
-\end{frame}}
+\end{frame}
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% 
 
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@@ -455,7 +480,7 @@
 \item Intuition: whatever is learned from the dataset would be learned regardless of whether
 \bl{$x_i$} participates\bigskip\pause 
 
-\item Noised needed in order to prevent queries:\\ Christian's salary $=$ 
+\item Noise needed in order to prevent queries:\\ Christian's salary $=$ 
 \begin{center}
 \bl{\large$\Sigma$} all staff $-$  \bl{\large$\Sigma$} all staff $\backslash$ Christian
 \end{center}